/* part1 ///////////////////////////////// */

.part1{
    height: 600px;
    box-shadow: 5px 5px 5px gray;
    background-image: url(/img/introduce/1.jpg);

}
.part1-3{
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 100px;
}

.p2-box1{
    width: 460px;
    height: 360px;
    background-image: url(/img/introduce/2.jpg);
    box-shadow: 5px 5px 5px gray;
}

.p2-box2{
    width: 500px;
}
.p2-box2-1 p{
    color: white;
}

.p2-box2-1 .h1{
    font-size: 50px;
}

.part1-1-btn{
    font-size: 25px;
    border-radius: 30px;
}



/*part2 ////////////////////////////////*/

.part2{
    height: 600px;
    text-align: center;
}

.nav-item a{
    color: black;
}
.part2-1 p{
    font-size: 20px;
}
.p2-choose li{
    margin: 0 auto;
}
.p2-choose a{
    font-size: 20px;
}


/* part3 //////////////////////////////// */

.part3{
    height: 500px;
}
.part3 .h1{
    text-align: center;
}
.part-big1,.part-big2{
    display: flex;
}

.p3-box1 p{
    text-align: center;
    color: black;
}
.p3-img1{
    display: flex;
    justify-content: center;
    align-items: center;
}



/* part4 //////////////////////////////// */
.part4{
    background-image: url(/img/introduce/9.png);
}
.part4-1{
    padding-top: 100px;
    text-align: center;
    height: 450px;
    color: white;
}
.part4-1 h1{
    font-size: 70px;
}
.p4-bnt{
    font-size: 25px;
    border-radius: 30px;
}



@media(max-width:1200px){

     /* 头部 */
     .dropdown{
        display: block;
    }
    .hdNav li a{
        display: none;
    }

    .header .hdMenu{
        display: block;
    }

    .hdMenu i{
        display: block;
    }
    /* part1 ///////////////////////////////// */
    .part1{
        height: 700px;
    
    }
    .part1-3{
        padding-top: 0;
    }

    .p2-box1{
        width: 460px;
        height: 360px;
    }

    .p2-box2{
        width: 500px;
    }

    .p2-box2-1 .h1{
        font-size: 35px;
    }
    .part2-1-btn{
        margin-top: 50px;
        font-size: 20px;
    }



    /* part3////////////////////////////////////// */
    .part3{
        height: 800px;
    }
    .part-big1,.part-big2{
        display: block;
    }
    .p3-box1 p{
        font-size: 15px;
    }


    /* part4/////////////////////////////////// */
    .part4-1 h1{
        font-size: 30px;
    }

}